Exodus 22:20 KJV
He that sacrificeth unto any god, save unto the Lord only, he shall be utterly destroyed.
Exodus 22:20, King James Version
In context
19 Whosoever lieth with a beast shall surely be put to death.
20 He that sacrificeth unto any god, save unto the Lord only, he shall be utterly destroyed.
21 Thou shalt neither vex a stranger, nor oppress him: for ye were strangers in the land of Egypt.